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Finding the Fourth Proportional to 65,659.52, 90,578.48 and 42,988.48

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Solution

The fourth proportional to 65,659.52, 90,578.48 and 42,988.48 is: 59,303.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,659.52 : 90,578.48 = 42,988.48 : x
  2. Step 2: Convert to fraction form
    65,659.52/90,578.48 = 42,988.48/x
  3. Step 3: Cross multiply
    65,659.52x = 90,578.48 × 42,988.48
  4. Step 4: Simplify right side
    65,659.52x = 3,893,831,175.91
  5. Step 5: Solve for x
    x = 3,893,831,175.91/65,659.52
  6. Step 6: Final answer
    x = 59,303.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.